CN111610347A - Bus loop resistance wiring device - Google Patents
Bus loop resistance wiring device Download PDFInfo
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- CN111610347A CN111610347A CN202010426945.5A CN202010426945A CN111610347A CN 111610347 A CN111610347 A CN 111610347A CN 202010426945 A CN202010426945 A CN 202010426945A CN 111610347 A CN111610347 A CN 111610347A
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- jaw
- motor
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- clamp body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a bus loop resistance wiring device, which belongs to the technical field of power supply tests, in particular to a bus loop resistance wiring device, comprising: the wire connecting clamp comprises a wire connecting clamp body, a movable clamp jaw part, a power part and a control unit; the device adopts the motor to drive the movable part of the wiring clamp to move, and does not need workers to ascend to install the wiring clamp body on a bus. The control unit is provided with a clamping force sampling module for adjusting the clamping force of the first jaw and the second jaw. The device is also provided with an extension unit, and the extension unit is connected with the wiring clamp body in a hinged mode, so that the operation is convenient. The control unit is also provided with an electric contact detection module which is used for checking whether the first jaw and the second jaw form electric contact with the bus and sending out sound and light alarm signals when the electric contact is detected.
Description
Technical Field
The invention relates to the technical field of power supply tests, in particular to a bus loop resistance wiring device.
Background
The primary equipment bus in the transformer substation is connected with the bus and the branch connecting line through the anchor ear, and because the anchor ear operation environment is changeable and large current flows in the operation process, the loop resistance between the bus and the anchor ear is increased due to the fact that an oxidation film is generated between connection faces or anchor ear bolts are loosened. Therefore, the loop resistance of the connecting wire between the two sections of buses and the connecting hoop and the loop resistance of the bus and the bus branch connecting wire need to be measured in the maintenance process.
Under the normal condition, the high-altitude wiring clamp with a large bus diameter has a small jaw and is difficult to clamp the bus, and the high-altitude wiring clamp has large impact on equipment in the operation process and is easy to damage the equipment. The structure is limited to the slideway of the wiring clamp, so that the volume and the weight of the wiring clamp special for the bus are too large; the bus bars are generally provided at a high level, which makes the operation difficult.
The commonly used loop resistance test wire clamp cannot clamp a bus because the opening is small, and the defects of too large weight, inconvenience in operation and the like of the wire clamp are caused by increasing the size of the wire clamp.
Disclosure of Invention
The invention provides a bus loop resistance wiring device which is used for solving the problem that a bus needs to be manually clamped during a bus test.
The invention adopts the following technical scheme:
a bus loop resistance wiring device comprising: the wire connecting clamp comprises a wire connecting clamp body, a movable clamp jaw part, a power part and a control unit; the wiring clamp body is provided with a guide groove, and a first jaw is fixedly arranged on the wiring clamp body; the control unit is used for controlling the power part to drive the movable jaw part to slide along the guide groove of the wiring clamp body; the movable jaw portion includes: the sliding block is connected with the jointing clamp body in a sliding mode, the second jaw is fixedly connected with the sliding block, and the sliding block is provided with a threaded hole; the sliding block and the wiring clamp body are made of insulating materials, and the first jaw and the second jaw are made of conductive materials; the power section includes: the motor is a direct current motor, the motor is fixedly connected with the jointing clamp body, an output shaft of the motor is in transmission connection with the lead screw, a thread is arranged on the cylindrical surface of the lead screw, and the lead screw is in thread fit with a threaded hole of the sliding block; the control unit includes: the controller receives input of a key switch signal, the motor is controlled to rotate by the relay set, the key switch and the relay set are respectively electrically connected with the controller, and the motor is electrically connected with the relay set.
Further, the control unit further includes: the clamping force sampling module is used for feeding back the current of the motor to the controller, and when the current of the motor reaches a threshold value, the motor is controlled to stop rotating.
Further, the clamping force sampling module is provided with a potentiometer, and the potentiometer is used for adjusting the amplification factor of the motor current, so that the clamping force of the movable jaw is adjusted.
Further, the potentiometer is provided with a digital mark, and the digital mark is used for indicating the clamping force.
Further, still include: an extension unit comprising: the extension rod is hinged to the wiring clamp body through the hinge bolt, the lock nut is in threaded fit with the hinge bolt, and the lock nut is used for locking the extension rod and the wiring clamp body.
Further, the lock nut is a butterfly nut.
Further, still include: the electric contact detection module is used for prompting that the first jaw and the second jaw are in electric contact with an external bus, the electric contact detection module is provided with a sound prompting circuit, the electric contact detection unit is electrically connected with the controller, and the controller is used for providing audio signals for the electric contact detection unit.
Furthermore, the electric contact detection module is also provided with an indicator light prompt circuit.
Further, the power part is provided with a coupler, the coupler is made of insulating materials, one end of the coupler is fixedly connected with the motor output shaft, and the other end of the coupler is fixedly connected with the lead screw.
Further, the first jaw and the second jaw are made of at least one of the following materials: hardening high-speed steel and hard alloy.
The invention has the following positive effects:
the invention discloses a bus loop resistance wiring device, comprising: the device adopts the motor to drive the movable part of the jointing clamp to move, does not need workers to ascend and install the jointing clamp on a bus, does not need manual clamping on the bus, is labor-saving in operation, does not need ascending operation, and has high safety factor. The wiring clamp body and the sliding block are made of insulating materials, the electrical isolation effect is good, and even if partial induction charges exist in the bus, the life safety of operators can be guaranteed. The first jaw is made of hard alloy and/or hardened high-speed steel, and when the jaws are stressed, the two protrusions of the first jaw can be embedded into the bus, so that the effects of removing an oxide layer on the surface of the bus and realizing good electric contact are achieved.
The control unit is provided with a clamping force sampling module, the clamping force of the first jaw and the second jaw can be adjusted, the bus is protected from being damaged by the first jaw and the second jaw, and the motor is not burnt. The clamp force is adjustable, and the test at every turn all can be adjusted to unanimously for test work clamp force is unanimous at every turn, and it is more accurate to detect data, and whether the staff need not the first vice jaw of visual observation and second vice jaw and presss from both sides tightly, also need not manual stop motor and rotates, and easy operation saves trouble.
The device still is equipped with the extension unit, and the extension unit adopts articulated form to be connected with the wiring pincers body, is receiving environmental impact, is equipped with the building below the generating line that inserts as required, when can not operating under the generating line, can adjust the angle of extension unit and wiring pincers body for first keeping silent and second keep silent card main bus, convenient operation.
The control unit is also provided with an electric contact detection module, after the first jaw and the second jaw reach a preset clamping force, whether the first jaw and the second jaw are in electric contact with the bus is checked, and when the electric contact is detected, an audible and visual alarm signal is sent out. The module can prevent the first jaw and the second jaw from pressing the bus bar, but no electric contact is formed, so that blind test is carried out, and useless work is done on vain.
Drawings
FIG. 1 is a schematic front view of a circuit resistor junction device according to an embodiment of the present invention;
FIG. 2 is a left side view of a circuit resistor connection device according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view taken at A-A in FIG. 2;
FIG. 4 is a schematic cross-sectional view taken at B-B of FIG. 2;
FIG. 5 is a schematic diagram of a motor commutation circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a controller circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a relay coil drive circuit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a signal amplification circuit according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a potentiometer indicating mode according to an embodiment of the present invention;
FIG. 10 is a schematic view of an electrical contact detection module according to an embodiment of the present invention.
In the figure: the wire connecting clamp comprises a wire connecting clamp body 1, a first jaw 2, a second jaw 3, a sliding block 4, a motor 5, a screw rod 6, an extension rod 7, a hinge bolt 8, a locking nut 9, a coupler 10 and a bus 11.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-10, a bus bar 11 loop resistance wiring device includes: the wire connecting clamp comprises a wire connecting clamp body 1, a movable clamp jaw part, a power part and a control unit; the wiring clamp body 1 is provided with a guide groove, and the wiring clamp body 1 is fixedly provided with a first jaw 2; the control unit is used for controlling the power part to drive the movable jaw part to slide along the guide groove of the wiring clamp body 1; the movable jaw portion includes: the second jaw 3 and the sliding block 4 are arranged, the sliding block 4 is connected with the jointing clamp body 1 in a sliding mode, the second jaw 3 is fixedly connected with the sliding block 4, and the sliding block 4 is provided with a threaded hole; the sliding block 4 and the jointing clamp body 1 are made of insulating materials, and the first jaw 2 and the second jaw 3 are made of conductive materials; the power portion includes: the wire connecting clamp comprises a motor 5 and a screw rod 6, wherein the motor 5 is a direct current motor, the motor 5 is fixedly connected with a wire connecting clamp body 1, an output shaft of the motor 5 is in transmission connection with the screw rod 6, the cylindrical surface of the screw rod 6 is provided with threads, and the screw rod 6 is in threaded fit with a threaded hole of a sliding block 4; the control unit includes: the controller receives input of a key switch signal and controls the motor 5 to rotate through the relay group, the key switch and the relay group are respectively electrically connected with the controller, and the motor 5 is electrically connected with the relay group.
More specifically, the binding pliers body 1 includes fixed connection's first section and second section, two sections are constituteed the shape and are Arabic numeral "7" word shape, first section is equipped with first keeping silent 2, first keeping silent 2 is equipped with two wedge archs, two wedge bellied most advanced conduct with the contact point of generating line 11 contact, the material is conductive material usually, in order to reach better contact effect, and can get rid of the oxide layer of generating line 11, it must have sufficient hardness to require, this embodiment adopts carbide, when keeping silent the atress, two archs can imbed inside the generating line 11, thereby reach and get rid of generating line 11 surface oxide layer, realize the effect of good electrical contact. The second section is provided with a guide groove which is a T-shaped groove and is arranged on the inner side of the '7' shape.
The shape of the sliding block 4 is like Arabic numerals '8', a threaded hole is formed in the first section of the sliding block 4, and the first section of the sliding block 4 is in sliding connection with the guide groove of the jointing clamp body 1. The second jaw 3 is fixedly arranged on the second section, the second jaw 3 is made of metal, and one side of the second jaw, which is in contact with the bus 11, is a concave arc and is used for matching with the outer contour of the bus 11 in the shape of a cylinder.
The screw rod 6 is in transmission connection with the motor 5, the shaft coupling 10 is coaxially connected in the embodiment, and the shaft coupling 10 is made of an insulating material. The screw rod 6 and the motor 5 can also adopt belt transmission and universal joint transmission, and the technical effect equal to the embodiment can be achieved.
The motor 5 is a dc motor, and the permanent magnet dc motor includes a first connection terminal and a second connection terminal, where the first connection terminal is connected to the positive pole of the dc power supply, the motor 5 rotates in the forward direction when the second connection terminal is connected to the negative pole of the dc power supply, the first connection terminal is connected to the negative pole of the dc power supply, and the motor 5 rotates in the forward direction when the second connection terminal is connected to the positive pole of the dc power supply.
The main loop for controlling the motor 5 adopts an H bridge connection, KA11 and KA12 are two normally open contacts of the relay KA1, and KA21 and KA22 are two normally open contacts of the relay KA 2. The first end of KA11 is connected with the positive pole of DC power supply, and the second end is connected with the first wiring terminal of motor 5. The first end of KA12 is connected with the second connecting terminal of motor 5, and the second end is connected with the negative pole of DC power supply. The first end of KA21 is connected with the positive pole of the DC power supply, and the second end is connected with the second wiring terminal of the motor 5. The first end of KA22 is connected with the first wiring terminal of motor 5, and the second end is connected with the negative pole of DC power supply.
The controller of the embodiment adopts a single chip microcomputer, the model is STC12C5A60S2, the number in the figure is U2, and a timer module and a basic input/output port are arranged in the single chip microcomputer, so that the requirements of people can be met. In this embodiment, the port P0 is used, and the port P0 is a multiplexed input/output IO port, that is, it may be an input or an output. The ports P00 and P01 are provided with key switches, and the wiring modes and the working principles of the ports P00 and P01 are the same. PB1 and PB2 are key switches, one end of PB1 is connected with the negative pole of the DC power supply, the other end is connected with the port P00, one end of PB2 is connected with the negative pole of the DC power supply, and the other end is connected with the port P01. When the PB1 is pressed, the P00 port is at low level, and when it is popped up, it is at high level. When the PB2 is pressed, the P01 port is at low level, and when it is popped up, it is at high level.
The KA1 and KA2 are relays, and relay coils of the KA1 and the KA2 are controlled by a controller. The wiring mode and the working principle of the two are the same. The T2 and the T3 are PNP type triodes, and the emitter of the T2 is connected with the positive electrode of the direct current power supply. One end of the resistor R4 is connected with the P05 port of the singlechip, and the other end is connected with the base electrode of T2. One end of the coil KA1 is connected with the negative electrode of the DC power supply, and the other end is connected with the collector electrode of T2. When the output of the port P05 of the singlechip is at a high level, the coil KA1 is electrified, the normally open contact KA1 is closed, when the output of the port P05 of the singlechip is at a low level, the coil KA1 is deenergized, and the normally open contact KA1 is disconnected. The emitter of the T3 is connected with the positive pole of the direct current power supply. One end of the resistor R5 is connected with the P06 port of the singlechip, and the other end is connected with the base electrode of T3. One end of the coil KA2 is connected with the negative electrode of the DC power supply, and the other end is connected with the collector electrode of T3. When the output of the port P06 of the singlechip is at a high level, the coil KA2 is electrified, the normally open contact KA2 is closed, when the output of the port P06 of the singlechip is at a low level, the coil KA2 is deenergized, and the normally open contact KA2 is disconnected.
During operation, the staff hangs first jaw 2 on bus 11, press button PB1, singlechip P00 mouth becomes the low level, P05 mouth output high level, relay KA1 coil is electrified, the normally open contact of relay KA1 is closed, motor 5 first binding post is connected with the DC power supply positive pole, second binding post is connected with the DC power supply negative pole, motor 5 forward rotation, the staff observes when first jaw 2 and second jaw 3 press from both sides bus 11 through visual observation, loosen PB1 button, the singlechip senses P00 mouth is high level, P05 mouth output low level, relay KA1 coil loses electricity, motor 5 stall, first jaw 2 and second jaw 3 are as the access point that detects bus 11, form the electrical contact with bus 11, can begin bus 11 return resistance test work this moment. 11 return circuit resistance test of generating line finishes the back, press button PB2, singlechip P01 mouth becomes the low level, P06 output high level, relay KA2 coil gets electric, relay KA2 normally open contact is closed, 5 first binding post of motor are connected with the DC power supply negative pole, second binding post is connected with the DC power supply positive pole, 5 reverse rotation of motor, bus 11 is loosened to first jaw 2 and second jaw 3, can take off the binding clip body 1 from bus 11 this moment.
Adopt motor 5 to drive the activity of jointing clamp movable part, do not need the staff to ascend a height and install jointing clamp body 1 on generating line 11, also do not need the manual clamping generating line 11, the labour saving operation need not the operation of ascending a height, factor of safety is high. The wiring clamp body 1 and the sliding block 4 are made of insulating materials, the electric isolation effect is good, and even if partial induction charges exist in the bus 11, the life safety of operators can be guaranteed.
Further, the control unit further includes: the clamping force sampling module is used for feeding back the current of the motor 5 to the controller, when the current of the motor 5 reaches a threshold value, the motor 5 is controlled to stop rotating, the clamping force sampling module is provided with a potentiometer, and the potentiometer is used for adjusting the amplification coefficient of the current of the motor 5 so as to adjust the clamping force of the movable jaw. The potentiometer is provided with a digital mark which is used for indicating the size of the clamping force.
More specifically, the second binding post of motor 5 is equipped with sampling resistance R1, and sampling resistance R1 first end MIV is connected with the second binding post of motor 5, and the second end is connected with the second end of KA21 normally open contact and KA12 normally open contact first end respectively. The first end MIV of the sampling resistor R1 is used as a sampling signal of the current of the motor 5, and outputs the signal to the signal amplifying circuit.
The core of the signal amplifying circuit is U1, the chip is an operational amplifying circuit chip, and the positive input end is connected with the first end MIV of the sampling resistor R1. One end of the resistor R7 is connected with the reverse input end of the U1, and the other end is connected with the negative electrode of the direct current power supply. One end of the potentiometer VR1 is connected with the reverse input end of the U1, the other end of the potentiometer VR1 is connected with the output end of the U1, the output end of the U1 outputs an amplified current signal MOV of the motor 5, and the signal is input to a P02 port of the singlechip U2. The amplification factor of the signal amplification circuit is as follows:
MOV=MIV(1+VR1/R7)
when the current of the motor 5 is gradually increased along with the clamping force, the MOV voltage is increased, when the voltage threshold value of the level voltage of the single chip microcomputer is reached, the port P02 of the single chip microcomputer is in a high level state, the port P05 is controlled by the single chip microcomputer to output a low level state, and the coil KA1 is de-energized.
The working process is as follows: the staff point presses PB1, single chip microcomputer control P05 mouth output high level, the KA1 coil gets electricity, KA1 normally open contact is closed, motor 5 forward rotation, when first jaw 2 and second jaw 3 press from both sides tight generating line 11, motor 5's electric current progressively increases, motor 5 electric current is through the signal amplification circuit after enlargiing, output voltage MOV to singlechip P02 mouth, when the electric current increases to P02 mouth and is high level, single chip microcomputer control P05 mouth output low level, KA1 coil loses electricity, KA1 normally open contact disconnection, motor 5 stall. At this point, a predetermined clamping force is achieved.
The circuit can also adjust the amplification factor of the signal amplification circuit by adjusting VR1, wherein the larger the amplification factor is, the smaller the current of the corresponding motor 5 is when the high level of the P02 port is reached, and the smaller the clamping force is. The clamping force may be adjusted by a digital identification on VR 1.
The control unit provided with the clamping force sampling module can adjust the clamping force of the first jaw 2 and the second jaw 3, protect the bus 11 from being damaged by the first jaw 2 and the second jaw 3, and ensure that the motor 5 is not burnt. The clamp force is adjustable, and the test at every turn all can be adjusted to unanimously for test work clamp force is unanimous at every turn, and it is more accurate to detect data, and whether the staff need not the first 2 and the second of keeping silent of visual observation yet presss from both sides tightly, also need not manual stop motor 5 and rotates, and easy operation saves trouble.
Further, bus 11 return circuit resistance termination still includes: an extension unit comprising: extension rod 7, hinge bolt 8 and lock mother 9, extension rod 7 pass through hinge bolt 8 and the wiring pincers body 1 is articulated, and lock mother 9 and hinge bolt 8 screw-thread fit, lock mother 9 are used for locking extension rod 7 and wiring pincers body 1. The lock nut 9 is a butterfly nut.
The extension unit is connected with the jointing clamp body 1 in a hinged mode, a building is arranged below a bus 11 which is connected as required under the influence of the environment, and when the operation is not performed under the bus 11, the angle between the extension unit and the jointing clamp body 1 can be adjusted, so that the first jaw 2 and the second jaw 3 clamp the main bus 11, and the operation is convenient.
Further, the electrical contact detection module is used for prompting that the first jaw 2 and the second jaw 3 are both in electrical contact with the external bus 11, the electrical contact detection module is provided with a sound prompting circuit, the electrical contact detection unit is electrically connected with the controller, and the controller is used for providing an audio signal for the electrical contact detection unit. The electric contact detection module is also provided with an indicator light prompt circuit.
More specifically, KA31 and KA32 are normally open contacts of the relay KA3, T1 and T4 are PNP transistors, and an emitter of T4 is connected to a positive electrode of the dc power supply. One end of the resistor R6 is connected with the P07 port of the singlechip, and the other end is connected with the base electrode of T4. One end of the coil KA3 is connected with the negative electrode of the DC power supply, and the other end is connected with the collector electrode of T4. When the output of the port P07 of the singlechip is at a high level, the coil KA3 is electrified, the normally open contact KA3 is closed, when the output of the port P07 of the singlechip is at a low level, the coil KA3 is deenergized, and the normally open contact KA3 is disconnected.
The KA31 is connected with the T1 collector at the first end and the first jaw 2 at the second end. The first end of KA32 is connected with the second jaw 3, and the second end is connected with the negative pole of the DC power supply. R2 is the resistance of bus 11. The cathode of the light emitting diode LED1 is connected with the anode of the direct current power supply, the anode of the light emitting diode LED1 is connected with the first end of the sound element SPK1, and the second end of the sound element SPK1 is connected with the emitter of the T1. One end of the resistor R3 is connected with the base of the T1, and the other end is connected with the P03 port of the singlechip U2. The sound generation element SPK1 in this embodiment is a speaker.
Working process, after reaching the clamp force, singlechip U2 is through control relay KA1, thereby reach motor 5 stall, stall back through P07 mouth control relay KA3 coil get the electricity for one minute, KA3 normally open contact is closed, simultaneously through P03 mouthful output time be the audio pulse of one minute, the audio pulse signal is 1-15 KHz's rectangular wave signal, this embodiment adopts 5 KHz's rectangular wave signal, this signal is enlargied by triode T1, drive sound producing element SPK1 sends the distinguishable sound wave of people's ear, emitting diode LED1 sends the optical signal and indicates simultaneously, this signal explains that first jaw 2 and second jaw 3 all form good electric contact with generating line 11, reach the test condition. If the first jaw 2 and/or the second jaw 3 do not make good electrical contact with the bus bar 11, the T1 amplifying circuit cannot be formed and an audible and visual alarm signal cannot be sent out, and at the moment, the worker needs to operate again, check problems in the operation process and correct the problems.
And the control unit is provided with an electric contact detection module, checks whether the first jaw 2 and the second jaw 3 are in electric contact with the bus 11 or not after the first jaw 2 and the second jaw 3 reach a preset clamping force, and sends out an audible and visual alarm signal when the electric contact is detected. The module can prevent the first jaw 2 and the second jaw 3 from pressing the bus bar 11 but not forming electric contact, and the test is carried out blindly to do useless work.
The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. A bus loop resistance termination, comprising: the wire connecting clamp comprises a wire connecting clamp body (1), a movable clamp jaw part, a power part and a control unit; the wiring clamp body (1) is fixedly provided with a first jaw (2); the movable jaw portion includes: the wire connecting clamp comprises a sliding block (4) connected with the wire connecting clamp body (1) in a sliding mode and a second jaw (3) fixedly connected with the sliding block (4), wherein the sliding block (4) is provided with a threaded hole; the sliding block (4) and the wiring clamp body (1) are made of insulating materials; the power section includes: the wire connecting clamp comprises a motor (5) fixedly connected with the wire connecting clamp body (1) and a lead screw (6) in transmission connection with the motor (5), wherein the motor (5) is a direct current motor, and the lead screw (6) is in threaded transmission with a threaded hole of the sliding block (4); the control unit includes: the controller receives input of a key switch signal, the motor (5) is controlled to rotate through the relay set, and the key switch and the relay set are respectively electrically connected with the controller.
2. The bus loop resistive termination of claim 1, wherein the control unit further comprises: the clamping force sampling module is used for feeding back the current of the motor (5) to the controller, and when the current of the motor (5) reaches a threshold value, the motor (5) is controlled to stop rotating.
3. The bus bar loop resistance wiring device according to claim 2, wherein the clamping force sampling module is provided with a potentiometer for adjusting a feedback coefficient of the motor (5) current, thereby adjusting the clamping force of the movable jaw.
4. The bus loop resistive termination of claim 3, wherein the potentiometer is provided with a digital indicator for indicating the amount of clamping force.
5. The bus loop resistive termination of claim 4, further comprising: an extension unit comprising: the extension rod (7), the hinge bolt (8) and the lock nut (9), the extension rod (7) is hinged to the wiring clamp body (1) through the hinge bolt (8), and the lock nut (9) is in threaded fit with the hinge bolt (8).
6. Bus loop resistance connection device according to claim 5, characterized in that the locking nut (9) is a wing nut.
7. The bus loop resistive termination of claim 6, further comprising: the electric contact detection module is used for prompting that the first jaw (2) and the second jaw (3) are in electric contact with an external bus (11), the electric contact detection module is provided with a sound prompting circuit, the electric contact detection unit is electrically connected with the controller, and the controller is used for providing audio signals for the electric contact detection unit.
8. The bus loop resistive termination of claim 7, wherein the electrical contact detection module is further provided with an indicator light notification circuit.
9. The bus loop resistance wiring device according to claim 8, wherein the power part is provided with a coupler (10), the coupler (10) is made of insulating materials, one end of the coupler (10) is fixedly connected with an output shaft of the motor (5), and the other end of the coupler (10) is fixedly connected with the screw rod (6).
10. Bus-bar loop resistance connection device according to claim 9, characterized in that the first jaw (2) is provided with two wedge-shaped protrusions, the first jaw (2) and the second jaw (3) being made of at least one of the following materials: hardening high-speed steel and hard alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010426945.5A CN111610347A (en) | 2020-05-19 | 2020-05-19 | Bus loop resistance wiring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
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| CN113406364A (en) * | 2021-06-07 | 2021-09-17 | 一汽解放汽车有限公司 | Wiring system |
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